Electrode for producing arcs.



G. WAGENER.

BLCTRODE FOR PRUDUCNG ARCS.

APPLUANON FILED Nox'. 2z 1911,

Patented Mar. 4, 191.3

W/ messes.-

@Wifi :i more@ f e @illitllh i illiltml wie lolo his GUSTV YIGENER,SCHLEBUSCH-MANFOR'T, GERMANY, iSSGITOR TO E. I. DU PONT :on NEJUBSPOJVDER CMAIY, F EVILMINGTGN, EELTRE, A CQREORATION 0l? NEW' JERSEY.

ELECTRGDE FR PRGDUCING- ARCS.

,osseoe Speeication of Letters Estant.

@obtained Mar. 191%,

Application led November 22. 1911. Serial o. 661,763.

Electrodes for Producing Arcs, of Which the 'following is a full, clem,and exact description, reference being had 'to the accompanying,`drawings, which forni a poet of this specification.

My invention ielutes to certain improvements in electrodes used foi`pi'oclucing arcs, enclpiincipally for the production of long lights Aforcarrying out @as reactions. lts object is to considerably ret ucc theweer and tear of such electrodes Where mede of' metal. rlhis weer andtear of metal electrodes is d e to the heet ol such are lights tor'which they ere the storting point, and occuifs even when these metalelectrodes are loll cooling roedii'un, foi instance, Water.

l ltion consists in closely surroundne inetol eleotiodes With o` bodywhich, et ordinary teiuoeietuies, is substantially :1 non-conduct such:t'or instance, as cement oi' simileil mateiial, but which, when itbecomes heated, Will act as a conductor. rlhe are being initiallyfolined between the metal electrodes, by the heat gena-ated, thesurheling body becomes a conductor at those ece W" ch are close to theorc und the arc inied between the siu'iounding The nietellic eleceelectrodes,

invention, shown in the accompanying mvings7 in which Figure l. is itsectional View is Watei cooled metallic elecatioele closely sniroundedbyu conical body mede of cement, cley or siznihi material. that 'thissuii'ounding body d, is e non-conductor, the are` is ly Ltoinied by themetallic portion c. is soon, howevei?, as theaic has ceusecl thesuii'ounding boel-y t/o glow, et the point c near "fhei'e 'the eicspiings'froni the metallic electrode, -s suiounoling body becomesconductas, and the are jumbo thev `this storting point assumes dierentow end aie internally cooled by some Ii'endeied conduct metal electrodeto a point of the surround ing body near the pointo the formation of thearc. The fresh ail' entering fromuthe side, 'endeavors to press the arcfrom the suirouuding body to the metallic electrode, but-'as the instalelectrode is cooled, the aflinity tor the suiroundiug body is greate andthe starting point of the arc is mostly fomecl in the suifounding bodyon which, during the time of the existence of the are,

ositions. The metal electrode, itself, is e. ected but little bythe ac,and its weer and teei reduced to a minimum. The surrounding body is ofsuch material as to be'well able to withstand the action of the arc,end'tui theimoie, due to the i'equent changing of the ststingpoint ofthe eic, the fullelifect of the eic distributed over consideiable 1 Q Iuse e. hollow body, but of the seine materiel es that of thesul'iounding body Z, Fig. '1;

luto this holloy,7 body the cooled electrode is placed. The ends of thebody project beyond the end of the metallic electrode. ln thisconstruction, as in that of Fig. l, as soon as the arc is formed by themetallic electrode, the Wells of the suiiounding body ui'e highly heatedand tie crc is formed from the projecting ls of seid body. lt assumesdi'ercnt nos ins along 'the opge? hoiilci el seid sul hun. oo y.

do not herein claim' '.cally the electiode disclosed 2, cs the seineforms the subject4 neet-teiof o isionol applies tion led by me Mey l,1912, Serialllo. GSi-,436.

Having now fully flesciribe foy invention,

what l claimenfl clesie t protect by Let Patent is z,

l. An impfovccl ele-ctie mein-taining' arcos coni :i metallic coie bywhich the e'ic is iin ined, end eh electrode of Acei'nent suiiound. iigenrolhot chemically combinable with the metallic and permanentlyassociated therewith dui'ing' themsineunnce the-ero, and by which; afterthe suiiouudng electrode is le for forming and ineinteined. Y, e

The @nth mi electrode

